Improvement in lifting-jacks



w. F. monnow.

Lifting-lack. No.159 202. Q. PatehfqdJan"26, 1'875.

T ix u WWNESSES INVENTOR ATTORN EVS THE GRAPHIC CQPNUTb-UTNJSi-"H PARK PLACEJLY.

1 I I I UNITED STATES PATENT OFFICE.

WILLIAM F. MORROVV, OF NEWVILLE, PENNSYLVANIA, ASSIGNOR OF TWO- THIRDS HIS RIGHT TO WILLIAM A. MIDDLETON, OF SAME PLACE, AND JAMES M. MASON, OF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent No. 159,202, dated January 26, 1875; application filed January 9, 1875.

To all whom it may concern Be it known that I, WM. F. MORROW, of Newville, in the county of Cumberland and in the State of Pennsylvania, have invented certain new and useful Improvements in Lift ing-Jacks; and do hereby declare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction of a liftingjack, as hereinafter more fully set forth.

To enable others skilled in the art to construct and use the same, I will proceed to more particularly describe it, referring to the annexed drawings forming a part of this specification.

Figure 1 represents a side elevation of the jack, showing the position of the lever when a weight is applied to its outer end. Fig. 2 represents a side elevation, showing the position of the lever and the rack-bar after the weight has been removed.

My invention is especially designed for use with heavy wagons; and the essential feature of the same is to allow the rack-bar to release itself from the cross-bolt in the top of the standard, and fall, by its own weight, upon the top of the lever and under the cross-bolt, as shown in Fig. 2.

B represents a suitable base, to which is connected a standard, A. This standard may be composed of two uprights placed a short distance apart, or it maybe formed of a single piece and bifurcated at its upper part. Across the bifurcated top of the standard is a cross bar or bolt, 0. Between the bifurcated part of the standard, a suitable distance below the bolt or bar O, is pivoted a lever, D, having a curved plate, (I, at one end, and forming a long handle at the other. Hinged or pivoted to the lever D is a bar, E, having notches b on its under edge.

In operation the hinged bar E is thrown back on the lever, and the standard is then placed so that the part a will pass under the wagon-axle. The operator then brings down the lever until the wagon is sufficiently elevated, and then throws forward the bar E, so that one of the notches b will catch on the bar or bolt 0. This will cause the axle to be held in the raised position until it is desired to lower it. To do this the operator does not need to release the bar E from the rod 0, but simply needs to press down on the lever until the bar E is drawn far enough back, when it will fall under the bolt O and lie upon the lever. The weight of the wagon will then carry the lever down at the front end, as seen in the drawings.

This jack will be found of great advantage for raising heavy weights, inasmuch as a lover of considerable length (oftentimes six feet long) is required hence, to let down the wagon after it is raised, the operator would be required to get an assistant to release the rack-bar, were it not constructed and operated as hereinbefore described, whereby the rackbar falls under the cross-bar and upon the lever. The lever D may be made adjustable on the standard.

What I claim is The combination, with the bifurcated standard A, having bolt or bar 0, of the pivoted lever D and the notched bar E, hinged or pivoted to the lever so that it will fall upon the lever and under the bar 0, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 27th day of December, 1873.

WILLIAM F. MORROW.

Witnesses WM. H. KEEVER, J. It. FREY. 

